Coal-mining machine.



No. '239,335. PA'EBNTED SEPT. 22, 1903. Gv. MUSGHWBCK & J. TUDAS. CUAL MINING MAGHINB.

APPLICATION FILED APR. 13, 1903. l0 KQDBL- 3 SHEETS-SHEET 1.

Ma/Wm 'f A mil-:llllllnm 110.739,335. I PATENTBD sBPm.z2,19os.

G. MUSGHWEGK a J. mums.v L

GOAL MINING MACHINE. l

Agrmouron rum) Ara. 1a. 190s.

' s sums-snm 2.

No. 739.335. PATENTED SEPT. 22, 1903Y l G. MUSGHWEGK & J. TUDAS.

ACOAL MINING MCHINE.

APPLIoATIoN FILED un. 1a, 1903. v No mmm.. l a SHEETS-enum s.

t'ofzeg.

UNITEI) v IS-Tirrisv iatented september a2, 190e.

,PATENT GFFICE.

encuen Mnscnwncir AND :roHN TUDAs, or cARNneIE, PENNSYLVANIA.

GOAL-MINING MACHINE.

SPECIFICATION forming part of Letters Patent N o. 739,335, dated September 22, 1903. I

Appunti@ filed April 1s, 190s. f sain No. 153,200. (No mano This invention relates to certain new and useful improvements in coalmining machines, and relates more particularly to that class of machines which are used for making what is known in-the art of mining as undercuts. i

The object of this invention is to provide a machine which may be fed forwardby the motor which is carried by said machine for the operation of the boring-shaft and the machine to be automatically fed laterally in front forward end, forms a'bearing for the boringf shaft 3, said shaft passing through the crossof the cut. f

A further object of this invention is to provide a machine wherein the operating levers or handles are located' adjacently, whereby one `operator may readily control and handle the entire machine.

A still further object of this invention is to provide a machine which will be cheap and simple in construction, easily operated, and eflicient in operation.

A still further objectI of` this invention is to provide a machine that shall be short enough to pass between the face of the coal to be undercut'and thegfirst line of posts, thereby overcoming the necessity of-removing said posts and the material supported thereby to operate the machine.

' With the above'and-other objects in view the invention consists in the novel construction, combination, and arrangement of parts to be hereinaftery more fully described, and specically pointed out inthe claims.

In describing the invention in detail reference is had* to thefaccompanying drawings, forming a part of this specification, and wherein like numerals o f reference indicate like' parts throughout the several views, in whichy Figure 1 is a side elevation of oui-improved machine inoperative position for making an undercut. Fig. 2 is a plan view ofthe same. Fig. 3 is a detail of the jack used for anchoring the rear of the machine. Fig. 4 vis a lo'ngitudinal section of the machine, showing the salme mounted on the transportation-truck. Fig. 5 is a plan view of the machine. Fig. 6 isa rear elevation of the machine. Fig. 7 is a rear view of the clutch on the drive-gear of the boring-shaft. tion of the same. the boring-shaft with a transportation-roller secured thereto. Fig. 10 is a side elevation of the same. Fig. 1l is an end elevation of the brush connection on the electriccable Fig. 8 is a sectional elevadrum. Fig. 12 is a sectional elevation of the same. Fig. 13 is an end elevation of the ratchet connection between the anchor-chain sprocket, jack-wheel,and driving-shaft. Fig.

14 is a sectional elevation of the same.

The reference -numeral 1 indicates the frame of the machine, in which the different Fig. 9 is an end View of parts are mounted. A yoke 2, formed on its piece 4 5 of the frame'and having at its rear the driving-gear 6, which is connected therewith by a clutch mechanism, to be hereinafter more fully described. Y

A motor,wl1ich may be of anylwell-known form, is provided within the'motor-casing '7, which is secured to the side pieces of the frame 1 by the feet 8, provided on said casing. The rear end of the motor-shaft has secured thereon 'the driving-pinion 9, which meshes with the gear'6 fori driving the lboringshaft, and another pinion 10,5which may be formedintegral withthe pinion 9 or suitably secured tothe driving-shaft of the motor, meshes with the gear 111," which is rotatably lmounted in the cross-piece 12 of the frame,

and suitably secured to said gear on the opposite sidel of said bearing isvthe worm 14,

which engages the worm-wheel 15, wh-ichis rotatably mounted on the axle 16 of the wheels 17 of the machine. This gear 15 is provided on one face with the notched clutch member 18, the other member of said clutch' being keyed tothe axle 16, and an angle-lever 19 for actuating said clutch extends over the side frame of the machine, and a handle is formedv thereon.

mesheswith a worm-gear 21, which is securedy to one end of the shaft to which the drum is to the shaft 22, said shaft/having secured to its forward end the feed sprocket or gear 23, said sprocket being adapted when the Inachine is in an operative position to engage the teeth or corrugations formed on a portable rack or skid 24. The rear end of the shaft 22 has keyed thereto the ratchet-wheel 25, and a jaclc-wheel 26, which is connected to a chain-sprocket 27, is loosely mounted on said shaft and held in contact with the sprocket by the collar 28. The face of the jack wheel which is next to the ratchetwheel 25 has mounted thereon the springpressed pawl 29, said pawl being normally in engagement with the teeth of the ratchetwheel and the relation of said ratchet-wheel and pawl being such that when the shaft is turned in a predetermined direction the sprocket will also be permitted to be turned; but said sprocket may be turned in a predetermined direction independent of the shaft by means of the jack-wheel.

The clutch before mentioned in connection with gear 6, which is loosely mounted on the boring-shaft 3, consists in forming the outside of the end of said shaft in a square shape, as indicated by 30 in Figs. 7 and 8. An elongated cutaway portion is formed in the face of the gea'r, and in this cut-away portion a slide 31 is adapted to operate. The said slide is provided with an aperture, which encircles the squared end of the shaft, one portion of said aperture being formed in a square to conform to the end of the shaft and the other portion being circular in form and of a size sufficient to permit the squared end of the shaft to revolve therein. A spring-pressed latch is placed adjacent to the slide, and said slide is provided with notches, with which this latch engages, whereby to hold the same in one of its two positions. Vhen the slide isin a position such as shown in Figs. 7 and4 y 8, the gear may be freely rotated without operating the boring'shaft but should the slide.

be moved to its otherpposition the turning of the gear carrying said slide rotates the boring-shaft by its squared end being engaged; by the squared aperture in the slide.

Suitable cutters are inserted in the apertures.

formed along one edge of every side, anda set-screw inserted at right angles secures the same in position. Figs. 9 and l0 show a roller which may be inserted in one of these cutterholes when the machine is moved, thereby keeping t-he forward end of the cutter-shaft olf the ground.

The cable 33, by which electrical energyis transmitted from any suitable source, is wound on a drum 34, which is rotatably mounted in the rear of the machine. Secured secured is the gear 35, which is engaged by the pinion 36, which is operated by the cranks and handle 37 for winding or unwinding the cable. The inner end of the cable, which rIlhe` boring-shaft has its forward end formed in a,

is secured to the drum, has its two terminals of opposite polarity conducted to insulated rings 8, which are secured in the end of the drum, and brushes contact therewith and by suitable Wires are connected with the controller 40. Suitable connections between the controller and the motor permit the actuation of the same, and a reversing-switch 4l is provided tocontrol the direction of the motor.

The jack, which is illustrated in Fig. 3, is for the purpose of holding the rear of the machineduringits transverse movement in making an undercut, for the reason that the cutter-shaft meeting with resistance from the matter in which the undercut is being made and the power for causing the transverse movement of the machine being at theforward end of the machine the same would tend to twist; buty by securing the chain 42 to the hook 43 in the j ack and then passing the same around the sprocket 27, as shown in Fig. 2, the rear of the machine will be held back and only permitted to travel at a speed coincident with'the revolutions of the shaft 22 and sprocket 23.

The transportation-truck, on which the machine may rest when being moved, consists of a platform 44, having extensions on either forward side, and guard-rails 45 being provided on either side the length thereof. This platform is mounted on suitable Wheels, and aloop at the rear and a removable chain at the forward end form a place to hook onto the same to drag it about.

While we have shown and describedour in vention in` detail as practiced` by us, yet it will be obvious that various slight changes may be made in the details of construction without departing from the generalspiritv of our invention.

Having fully described our invention, what weclaim as new, and desire to secure by Let- IOO IIO

l. Inamachine of the character described,

the combination of a frame mounted on a suitable truck, a boring-shaft rotatably mounted "in said frame and carrying a series of adj ustable cutters, a shaft mounted in said frame having at one end a toothed wheel adapted to engage some fixed surface for the purpose ofrnovingthe machine when said shaft is revolved, the other end of shaft having a sprocket connected therewith through a ratchet and pawl, a chain adapted to be passed over said sprocket, one end of the same being anchored, thereby to retard the movement of the machine, a motor mounted in said frame andsuitably geared to the boring-shaft, the shaft for moving the entire machine laterally andthe axle of the truck, substantially as described.

2. In a machine of the character described, the combination of a frame mounted on a suit'- able truck, a boring-shaft rotatably mounted thereon, the outer end of said shaft being "squaredaud twistedlinto a spiral, a plurality of adjustable cutters mounted in said squared portion of the boring-shaft, 'a motor having a gear connection with said boring-shaft, a clutch for disengaging 'said gear connection, a geared connection between said motor and the axle of the truck whereby the machine may be moved, a clutch for disengaging said geared connection, a shaft mounted in saidy frame,a toothed wheel mounted on one end thereof and adapted to engage a stationary surface whereby to give lateral movement to the machine when said shaft is revolved, geared connections between the said motor and the said shaft whereby the shaft may be re volved,'a sprocket loosely mounted on said' shaft and carrying a pawl, a ratchet secured to said shaft and engaged by said-pawl, means 'mounted onthe frame of the machine'for actuating the motor, a drum mounted in said frame,an electric cable one end of which is secured to said drumfconnections through brush and ring, connections betweenvsaid calole and the means for controlling the motor; 

